Note:
This is the same wish with a bit different reason.
I translate actions with their original English expressions using "@@" separator, like this.

Code:

DBE0EEA73EA7A24B=編集: 元に戻す @@ Edit: Undo

This is a strategy for easy search by entering English filter words regardless of incompleteness of my langpack (whether an action is translated or not), because it's too hard to translate a huge number of all actions.
So I wish actions with automatic postfixes are also written by %s format.
(... or, it will be great too if the action filter gets an option like "also filter by original English sentences")